This project took place in 2006. Measurement of 235 U enrichment for a variety of Uranium items Scope: This project was to provide quantitative 235 U enrichment data for a variety of bulk uranium-bearing items at the Imperial College Reactor Centre, Ascot. A High Resolution Gamma ray Spectrometry (HRGS) system was used. The technique is based on use of the standard Multi-Group Analysis (MGAU) software which measures the low energy gamma rays from Uranium. Measurements were performed at the Imperial College Reactor Centre in Berkshire, UK. Key Drivers: Imperial College’s key requirement for this project was to ascertain the 235 U enrichment on a variety of Uranium items. Robust historical inventory data was not available and so measurements were needed to provide essential nuc

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